Castle Tower - stuck near the end

Hi. Epic game. Alice's prayer caused strong weapons and high enchanters to appear, probably. Very fun.
Now, I can't enter the NW-most teleporter on Third Floor because I get to Castle Tower over and over. How do I get past this?
Now, I can't enter the NW-most teleporter on Third Floor because I get to Castle Tower over and over. How do I get past this?